#include <stdio.h>

int main()
{
    int money, ratio, days;
    while (scanf("%d", &money) == 1 && money >= 0)
    {
        scanf("%d%% %d", &ratio, &days); 
        printf("%.2lf\n", money * ratio / 100.0 * days / 365);
    }
    return 0;
}
